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Successful carboxypeptidase G2 rescue in delayed methotrexate elimination due to renal failure
A Zoubek1, H A Zaunschirm, T Lion
1St. Anna Children's Hospital, Vienna, Austria.
Pediatric Hematology and Oncology
|September 1, 1995
Abstract:
We report on an 18.5-year-old woman with osteosarcoma and delayed methotrexate (MTX) elimination due to renal failure after high-dose MTX, in whom rescue with high doses of folinic acid caused intolerable side effects. In this life-threatening clinical situation, the patients was rescued by the administration of recombinant carboxypeptidase G2, a bacterial enzyme that rapidly hydrolyzes MTX into inactive metabolites. This is the first report on the successful clinical use of this alternative catabolic route for the elimination of MTX.